Spotting 5weeks 5days pregnant

I’m currently 5 weeks and 5 days pregnant. Last night I noticed some light pink spotting after wiping. Since then I’ve had very faint brown spotting. I called the doctor and had blood work done today and will go back on Friday to check and see if my levels have doubled. Right now it’s just a waiting game and I’m having a hard time not panicking. I feel like I might have some very light cramping but I’m also feeling like I’m overanalyzing every slight twinge. Has anyone experienced this before or have any words of reassurance? I have one older child and never experienced anything like this during my first pregnancy. I also had a lot of morning sickness in my first pregnancy and none this time which is adding to my worry. Thanks so much for any advice you might have!